Need help. Can’t find correct water pump base for xr2 150. I need one with a dowel hole in the bottom. I purchased a 46-96418A kit, which is number on upper portion of pump housing. It did not include seal for base, which I need.I then ordered a base according to chart on internet. It is 46-8M0077147. It does not have dowel hole in bottom. No number on old base. Any help is appreciated.